EPA-regulated facilities in Canyon County, ID

There are 2,318 EPA-regulated facilities inside Canyon County, Idaho. The most common kinds are water discharge (1,737), hazardous waste (333), drinking water systems (180). 20 are currently in significant noncompliance, the EPA's designation for the most serious or persistent violations, and 100 have a violation on record. Penalties over the last five years total $7M across 29 sites.

Open the map of Canyon County

2,318facilities in the county

20in significant noncompliance

100with a violation on record

$7Min penalties, last 5 years

By category

Category	Facilities
Hazardous waste	333
Large quantity generators	3
Small quantity generators	120
Chemical (RMP/TRI)	57
Superfund	4
Air emissions	177
Major sources	4
Synthetic minor sources	26
Minor sources	120
Water discharge	1,737
Major permits	3
Minor permits	1,424
Drinking water systems	180
Greenhouse gas reporters	5
Scrap yards	4
Recycling centers	1

A facility enrolled in several programs counts once in the total and once in each of its categories.

In significant noncompliance

The EPA's designation for its most serious or persistent violations, as of the latest data.

PARMA WWTP W SINCLAIR AVE, PARMA, ID, 83660 Significant noncompliance · $669k in penalties
WOODGRAIN MILLWORK - NAMPA 1201 W KARCHER RD, NAMPA, ID, 83687 Significant noncompliance · $125k in penalties
J R SIMPLOT CALDWELL 16551 SIMPLOT BLVD, GATE 3, CALDWELL, ID, 83607 Significant noncompliance · $22k in penalties
ALANTE HOMES AT SPRING RUN 4107 LASTER LANE, CALDWELL, ID, 83607 Significant noncompliance · $6k in penalties
SORRENTO LACTALIS 4912 E FRANKLIN RD, NAMPA, ID, 83687 Significant noncompliance in 2 programs · $6k in penalties
SHORTSTOP INC ID Significant noncompliance
CALDWELL WWTP 504 JOHNSON LN, CALDWELL, ID, 83605 Significant noncompliance
LKQ CALDWELL 6423 CLEVELAND BOULEVARD, CALDWELL, ID, 83607 Significant noncompliance
PLEASANT VIEW MANOR WATER PLEASANT VIEW MANOR, CALDWELL, ID, 83607 Significant noncompliance
CRIMSON BRIDGE ESTATES 14533 RIVER RD, CALDWELL, ID, 83607 Significant noncompliance

Largest penalties

Penalties assessed over the last five years.

UPS - NAMPA CENTER 1324 N 20TH ST, NAMPA, ID, 83687 $5.3M in penalties
DARIGOLD CALDWELL FACILITY 520 ALBANY ST, CALDWELL, ID, 83605 $636k in penalties
VALLEY AGRONOMICS LLC 20870 VAN SLYKE RD, GREENLEAF, ID, 83626 $144k in penalties
MAIN AVE. APARTMENTS 221 E. MAIN AVE., NAMPA, ID, 83686 $41k in penalties
SYMAN LLC 2101 DELTA DRIVE, NAMPA, ID, 83687 $15k in penalties

Superfund sites

USDOI BLM CENTRAL COVE LANDFILL HOMEDALE RD 7MI W OF CY, T3N R4W S8&9, CALDWELL, ID, 83605
NAMPA RESIDENTIAL LEAD SITE 148 1ST ST, NAMPA, ID, 83687
USDOI BLM PICKLES BUTTE AIRSTRIP MISSOURI AV 2.5MI W MORA CANAL, NAMPA, ID, 83651
US DOI BLM DRY LAKE AIRSTRIP T1N R3W S26 NWNE, NAMPA, ID, 83651

Towns in Canyon County

Bordering counties

Reading these numbers

These are regulatory records, not measurements of pollution. Most facilities appear because they hold a permit or file reports, and most of them are compliant; a listing is not a claim that a facility has polluted anything. Compliance status and penalties are the EPA's own determinations in data retrieved Oct 9, 2026. The Data page explains where each record comes from and how it can mislead.